Few Git topics start more arguments than Git rebase vs merge. Both integrate changes from one branch into another, both get you to the same final code, and yet developers hold near-religious opinions about which to use. The good news: once you understand what each actually does to your history, the “right” answer for a given situation is usually obvious.
What merge does
A merge takes the changes from your branch and ties them into the target with a new merge commit. Your branch’s history stays exactly as it happened:
git checkout main
git merge featureThe result is a history that shows the true story — this branch existed, work happened on it, and here is where it rejoined. You get an explicit record of when and how the integration occurred. The cost is a busier graph with lots of merge commits.
What rebase does
A rebase instead replays your branch’s commits on top of the latest target, as if you had started your work from there:
git checkout feature
git rebase mainThe result is a clean, linear history with no merge commits — it looks like everything happened in a tidy sequence. The catch is that rebasing rewrites commit hashes, creating new commits in place of the old ones.
The golden rule
Here is the one rule that prevents disasters: never rebase commits you have already pushed and shared. Because rebase rewrites history, rebasing a branch other people are working on forces them into a painful mess of duplicated commits. Rebase your local, unpushed work freely; leave shared history alone.
A workflow that uses both
The teams I have enjoyed working on do not pick a side — they use each where it shines. Rebase your feature branch onto the latest main before opening a pull request, so your changes apply cleanly and your commits read as a coherent story. Then merge the reviewed branch into main, so there is a clear, permanent record of when the feature landed.
The bottom line
Merge preserves history exactly as it happened; rebase rewrites it to be linear and clean. Use rebase to tidy your own work before sharing it, use merge to integrate shared branches, and never rebase what others depend on. Frame Git rebase vs merge that way and the endless debate turns into a simple, situational choice.
